Module sort_expr 

Sort expressions

Structs

LexOrdering

This object represents a lexicographical ordering and contains a vector of PhysicalSortExpr objects.

LexRequirement

This object represents a lexicographical ordering requirement and contains a vector of PhysicalSortRequirement objects.

PhysicalSortExpr

Represents Sort operation for a column in a RecordBatch

PhysicalSortRequirement

Represents sort requirement associated with a plan

Enums

OrderingRequirements

Represents a plan’s input ordering requirements. Vector elements represent alternative ordering requirements in the order of preference. The list of alternatives can be either hard or soft, depending on whether the operator can work without an input ordering.

Functions

format_physical_sort_requirement_list

Writes a list of PhysicalSortRequirements to a std::fmt::Formatter.

is_reversed_sort_options

Check if two SortOptions represent reversed orderings.

optional_ordering_try_from_protoproto

Counterpart of optional_ordering_try_to_proto: an empty list decodes as None.

optional_ordering_try_to_protoproto

Serialize an optional LexOrdering, encoding None as an empty list.

options_compatible

Returns whether the given two SortOptions are compatible. Here, compatibility means that they are either exactly equal, or they differ only in whether NULL values come in first/last, which is immaterial because the column in question is not nullable (specified by the nullable parameter).

sort_exprs_try_from_protoproto

Reconstruct a sequence of sort expressions from the flat PhysicalSortExprNode list, the counterpart of sort_exprs_try_to_proto.

sort_exprs_try_to_protoproto

Serialize a sequence of sort expressions into the flat PhysicalSortExprNode list the wire format uses for an ordering.